Privacy Policy

Last updated: May 28, 2026

1. Introduction

SolarCalc.fyi ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you visit our website at solarcalc.fyi (the "Site") and use our off-grid solar calculator tool.

By using the Site, you agree to the collection and use of information in accordance with this policy.

2. Information We Collect

2.1 Information You Voluntarily Provide

  • Email address — when you choose to email your calculation results to yourself via the "Email My Results" feature. We use this solely to deliver the results you requested.
  • Appliance data and location — the appliances, wattages, usage hours, and location you enter into the calculator. This data is used only to generate your solar system design.

2.2 Information Collected Automatically

  • Analytics data — we use Google Analytics (GA4) to collect anonymized usage statistics such as page views, session duration, and browser type. This helps us improve the Site. No personally identifiable information is collected via analytics.
  • Cookies — the Site may use cookies for analytics purposes. You can disable cookies in your browser settings.
  • Ad-related data — if and when we display ads via Google AdSense, cookies and device identifiers may be used to serve relevant advertisements. Google's use of advertising cookies is governed by their own privacy policy.

3. How We Use Your Information

We use the information we collect for the following purposes:

  • To provide and maintain the solar calculator service
  • To send you your calculation results via email (only when you request it)
  • To analyze and improve the Site's performance and user experience
  • To display advertisements (if applicable)
  • To comply with legal obligations

4. Data Sharing & Disclosure

We do not sell, trade, or rent your personal information to third parties. We may share anonymized, aggregate data (which cannot identify you) for analytical or promotional purposes.

We may disclose your information if required by law or to protect our legal rights.

5. Third-Party Services

The Site uses the following third-party services:

  • Google Analytics — for anonymized usage analytics. Google Privacy Policy
  • Google AdSense — for advertising (when enabled). Google Privacy Policy
  • NREL API — to fetch real solar irradiation data for your location. No personal data is sent to NREL.
  • Aliyun DirectMail — to deliver emails you request. Your email is transmitted securely via SSL.

6. Data Retention

Calculation data (appliances, results) is stored in anonymized form to help us understand usage patterns. Email addresses provided via the share feature are stored only for as long as needed to deliver the requested results and for reasonable follow-up, after which they may be deleted.

7. Data Security

We implement reasonable security measures including:

  • SSL/TLS encryption for all data transmitted between your browser and our servers
  • Secure server configuration with regular updates
  • Limited access to stored data

However, no method of transmission over the Internet is 100% secure. We cannot guarantee absolute security.

8. Your Rights

Depending on your jurisdiction, you may have the right to:

  • Access the personal information we hold about you
  • Request correction or deletion of your data
  • Opt out of analytics or advertising cookies
  • Withdraw consent at any time

To exercise any of these rights, please contact us at admin@solarcalc.fyi.

9. Children's Privacy

The Site is not intended for children under 13. We do not knowingly collect personal information from children.

10. Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last updated" date.

11. Contact

If you have questions about this Privacy Policy, please contact us at:
Email: admin@solarcalc.fyi